Graco MAGNUM LTS 15 257060 Operation Manual page 30

Troubleshooting
Problem
Pressure is set at maximum but can-
not achieve a good spray pattern.
Spray gun stopped spraying.
When paint is sprayed, it runs down
the wall or sags.
When paint is sprayed, coverage is
inadequate.
Fan pattern varies dramatically while
spraying.
OR
Sprayer does not turn on promptly
when resuming spraying.
30
Cause
Reversible spray tip is in UNCLOG
position.
Spray tip is too large for sprayer.
Spray tip is worn beyond capability of
sprayer.
Extension cord is too long or not
heavy enough gauge.
Spray gun fluid filter is clogged.
InstaClean fluid filter is clogged.
Inlet screen is clogged.
Pump valves are worn or plugged
with debris.
Material is too thick.
Hose is too long (if extra section is
added).
Suction tube is leaking.
Spray tip is clogged.
Coat is going on too thick.
Coat is going on too thin.
Pressure control switch is worn and
causing excessive pressure variation.
Solution
Rotate arrow-shaped handle on
spray tip so it points forward in
SPRAY position, page 14.
Select smaller spray tip.
Replace spray tip.
Replace extension cord. Grounding
and Electrical Requirements, page 7.
Clean or replace spray gun fluid filter,
page 22.
Clean or replace InstaClean fluid fil-
ter, page 22.
Clean debris off inlet screen.
Check for worn pump valves.
a. Prime sprayer with paint
b. Trigger gun momentarily.
When trigger is released,
pump should cycle momen-
tarily and stop. If pump con-
tinues to cycle, pump valves
may be worn.
c. Remove valves and check for
debris.
Thin material.
Remove section of hose.
Tighten suction tube connection.
Inspect for cracks or vacuum leaks.
Unclog spray tip, page 14.
Move gun faster.
Choose a tip with smaller hole size.
Choose tip with wider fan.
Make sure gun is far enough from
surface.
Move gun slower.
Choose tip with larger hole size.
Choose tip with narrower fan.
Make sure gun is close enough to
surface.
Take sprayer to Graco/M
authorized service center.
AGNUM
313034H